M4-ATX Help

trover4 · 07-03-2008, 01:20 PM

i don't want to seem "spoonfed". and i did a search but couldn't find the answer i was looking for. so i will use as much detail as i possibly can so tell me where i went wrong.

I ran 8 guage wire with a 40 amp fuse for 9 feet from the positive end of the battery to the v+ line on the m4. I ran 8 guage onto a proper ground 2 feet away from the gnd terminal on the m4. (the m4 is not plugged in to anything)

using a circuit tester it will light up at random places across the board, but not from the 24 pin connector. or any thing near them.

i also ran an accessory line to the ignition terminal on the m4 atx, and nothing happened. what did i do wrong?

i saw other posts, and right now my main concern is just getting the computer to get power and boot up...ill worry about the 1 min shutdown problem later.

soloxp · 07-03-2008, 01:54 PM

What MB you have.

DJiK · 07-03-2008, 02:49 PM

Quote: Originally Posted by trover4

i also ran an accessory line to the ignition terminal on the m4 atx, and nothing happened. what did i do wrong?

From what you have described you've done nothing wrong.

The modern computer PSU is made is such a way that it won't turn on unless it's attached to a motherboard (or hacked with a paperclip at the 20/24-pin ATX connector).

I suggest you to plug it in to a motherboard/computer and press the power button to see if it turns on.

trover4 · 07-03-2008, 03:03 PM

my mother board is Intel D201GLY 1.33 GHz Celeron Mini ITX mobo

i figured it would send power throughout the m4 board without being plugged into a motherboard with the powerbutton on. but i just tried it and still nothing.

soloxp · 07-03-2008, 05:12 PM

Quote: Originally Posted by trover4

my mother board is Intel D201GLY 1.33 GHz Celeron Mini ITX mobo

i figured it would send power throughout the m4 board without being plugged into a motherboard with the powerbutton on. but i just tried it and still nothing.

I have the Intel D201GLYA, Did you conect the 12v cable to the M4 and MB. Also did you connect pin 7-6 on jumper J8 then to the MB on/off. If that didn't work try a ATX PS and see if it boot.

Bugbyte · 07-03-2008, 05:51 PM

You need the 4 pin cable from the M4 to the D201GLY in addition to the ATX cable. It's the yellow/black cable on the left in this photo.

Also, as suggested, did you connect the ACPI wire to the right pins on the M4 and mobo?

trover4 · 07-04-2008, 02:38 AM

yup im missing the yellow and black wire, anyone know where to get one?

kibble · 07-04-2008, 07:02 PM

One thing that doesn't seem touched upon yet is what mode you have the M4 set to with the dip switches? You will still need to have the 4 pin connector but it should still turn on without it. Like if it's mode P0 then you should at least have the 5VSB on at all times, (the purple wire). If that's not working then something else could be wrong.

trover4 · 07-07-2008, 02:07 PM

i found the 4 pin wire under my bed yesterday, but still nothing through it...i put the setting at p0 and i can't get a signal through the purple wire like you said kibble. im kind of dumbfounded, let me post some pictures so you guys can help me find what i did wrong.

the power line is showing it has power

the accessory line has power

even some random pin (that i have no idea what does) has power.

\
but alas, the purple wire has no power, (nor does any wire in the 4 pin or the 20 pin.)

Rob Withey · 07-07-2008, 02:15 PM

Quote: Originally Posted by DJiK

The modern computer PSU is made is such a way that it won't turn on unless it's attached to a motherboard (or hacked with a paperclip at the 20/24-pin ATX connector).

You don't have the power supply plugged into a motherboard, did you jumper PS_ON to turn on the power supply?

trover4 · 07-07-2008, 02:28 PM

i had already tried it, let me post a few snap shots, and see where i went wrong. (this is the first time in my life i hope i made a mistake).

this is how i have it hooked up

and i push the button, and nothing happens. any other ideas, or did i do something wrong here?

trover4 · 07-07-2008, 02:31 PM

Quote: Originally Posted by Rob Withey

You don't have the power supply plugged into a motherboard, did you jumper PS_ON to turn on the power supply?

wait a minute, what do you mean by jumper ps_on?

david69leonard · 07-07-2008, 02:33 PM

Is the fuse still good on the M4? I know its a dumb question, but everything looks good to me.

trover4 · 07-07-2008, 02:51 PM

yeah i just checked the fuse. not burnt and power going in one side and out the other.

Rob Withey · 07-07-2008, 02:54 PM

Quote: Originally Posted by DJiK

From what you have described you've done nothing wrong.

The modern computer PSU is made is such a way that it won't turn on unless it's attached to a motherboard (or hacked with a paperclip at the 20/24-pin ATX connector).

I suggest you to plug it in to a motherboard/computer and press the power button to see if it turns on.

Quote: Originally Posted by trover4

wait a minute, what do you mean by jumper ps_on?

PS_ON is a pin on the ATX connector that is grounded by the motherboard to turn on the power supply. If the motherboard is not there then you can fool it into turning on by shorting PS_ON to ground. Otherwise the power supply will just sit there doing nothing. There is a section in the faq about it (in the section relating to using a conventional power supply to feed the car psu when running in the house).

Of course if you have a motherboard connected then this isn't a problem. It just looked as if you were expecting voltage to magically appear on the ATX lines without PS_ON being grounded.

BTW: test lights apply a slight load (more than a multimeter). If I were you I wouldn't go randomly testing voltages in a circuit on a "random pin (that i have no idea what does)". You might find a line that can't supply the required current, and break something.